Mindwipe

Charisma
Level: Telepath 4; Display: Audible, Material, Visual; Manifestation Time: Attack action; Range: Close (25 ft. + 5 ft./2 levels); Target: One living creature; Duration: Instantaneous; Saving Throw: Fortitude negates; Power Resistance: Yes; Power Points: 7
You partially wipe your victim's mind of past experiences, bestowing one negative level per two manifester levels (maximum five negative levels).
If the subject has at least as many negative levels as HD, he dies. Each negative level gives a creature the following penalties: -1 penalty on attack rolls, saving throws, skill checks, ability checks, and effective level (for determining the power, duration, DC, and other details of power, spells, or special abilities). The creature also loses 5 hit points. Additionally, a psionic character or creature loses one power from her highest available level (spellcaster loses one spell or spell slot from her highest available level). Negative levels stack. Assuming the subject survives, he regains lost levels after a number of hours equal to your manifester level. Usually, negative levels have a chance of permanently draining the subject's levels, but the negative levels from mindwipe don't last long enough to do so.